ASUS puffer motherboard in HP m1090n media center PC
Read somewhere that there are BIOS downloads that can accommodate low noise CPU fans.
This is what is installed now=
PTGD-LA/PTGD1-LA/PTGD2-LA Motherboard BIOS Update 05-2006 3.28=version
The HP prescott is just over 50 centigrade on start up and rises to over 70 centigrade, but I can only see this in the
BIOS, so I reboot and go into the BIOS after it has been running a while and is still HOT. The air flow is MUCH hotter
than my 2 other HP computers in the same series that only have a 3.0 GHz CPU. I can easily live with their noise level,
but for the 3.6, I had to buy 3 pair of professional hearing protection to wear all over the apartment as I can even
hear it from upstairs....It is like living in a factory and the stress is killing me. I feel more relaxed when I put it
into hibernation. It comes out of hibernation to record, then I turn it off and watch the shows on the other 2
computers. Good thing I have a network, But since I can hear it from almost any room in the apartment, it is not a
system I would even recommend to an enemy, so I can not sell it.
The program speedfan can halp U. but the real reason wy is he so hot is
beacuse tha thermal paste between the procesor and sa heatsink is old.
U must replace that thermal paste and Ul see the diference
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This could be good or, it could be bad. Do you have any other indications it is a problem. The temperature sensor on the motherboard controls the fan. You can go into the BIOS and set the higher temperature higher (i.e. 110 F to 120 F). If the problem continues, and after a thorough cleaning of the interior, I would replace the fan.
two things. this fan can be a high rpm fan and there is nothign you can do about it.
the other thing could be the motherboard options. some motherboards by default don't throttle the fan unless you tell them to. If you go into the BIOS (read the manual) and look for the fan control system you can enable the fan speed control to be auto or some call it cool and quiet. this will throttle the fan down unless the higher speed it needed.
More likely is that the computer cpu is overheating and the motherboard is ramping up the cpu fan speed to try to cool it, hence the high fan speed and consequent noise. This usually happens when the heat sink is clogged with a lot of dust. It could just be that the fan heat sink came loose.
It may be that it's just a noisy fan, in which case replace it with one that doesn't make as much noise.
As for the green shroud, I would not recommend removing it. The computer case is designed to correctly circulate the air through the system and safely out. As for replacing the fans you can replace them with anything you like, just make sure the new fans are the same dimensions they come in szies 40, 60, 80, 92, 120, 140 and a newer 200 mm form factor so you can just measure them if you don't know the correct size. Next look at where the fans plug in, if it is a three pin plug then they fan's are kept at optimal speeds via the motherboard and bios. So they are already controlled by heat sensors / thermostat so to speak. If they are 2 pin then they just run full speed usually. For the back fan just make sure it is the right size and pin out. You can hook a 3 pin fan to a 2 pin fan plug on the board it will just run full speed all the time. For the CPU fan buy a combo fan/ sink and just make sure the sink is the same as the existing one so it will fit on the motherboard. You could probably get rid of the green shroud if you went with a really high end fan / sink for the CPU but that's up to you. For the thermal paste it is easiest to put a small blob in the center of the CPU and then use a plastic card, such as a drivers license to spread it out to cover the entire CPU, thinly and evenly. Add small amounts if you need to to cover the entire surface. Try not to have a bunch oozing out the sides although it won't really hurt if it is.
I was going to say dust is whats causing it but then i relized you have opened your computer. So nevermind that.
The fan speed is controlled by the motherboard. The Pentium 4 processor tells your motherboard how hot it is. so then the motherboard turns up the fan faster. Thats why its louder when the CPU is doing alot and is quieter when its doing nothing. You can try replacing the fan yourself but i would recommend just getting a whole new heatsink.
Sounds to me like you could have a couple of possible problems.
First and most importantly would be to make sure that your cpu fan is clean and running. This is the fan that is located on the large heat sink on the mother board. A lot of times, especially on older systems, this fan and heatsink will get covered with dust and almost always cause an overtemp fault. Usually blowing this out with electronics cleaner will rectify this but if it has been like that for a while you may need to replace the cpu fan. Most electronics stores will sell these fairly cheap.
Your other problem may be that you need to purchase another case fan to cool the cpu more effectively. Generally though most premade systems come with enough fans.
Also you may need a new fan for the one that he replaced. It sounds to me like you may have a bad connector either on the replacement fan or the power supply wire. A real easy way to tell is to wiggle the wires a little bit. If your fan speed fluctuates odds are you've got a loose connection. It can appear to be fine but sometimes those wires on the molex connectors come loose and make don't make good contact. When that happens it may work fine for a few minutes, but then the first time that you get vibrations it stops working.
This will depend on the motherboard you are using.
however, you need to make sure that the CPU fan lead is plugged into the correct plug on the motherboard... for example, I have an Intel 975xbx motherboard and it has 4 fan plugs, but only one of those is for the CPU. The others are for front/rear/top fans. If the CPU fan is plugged into one of the secondary ports, the CPU fan wont speed up correctly.
Also, some BIOS settings in the motherboard allow you to enable or disable automatic fan speed adjustment, and also set the temperature points.